1 . 听下面一段较长对话，回答以下小题。
1. Where does the conversation probably take place?

A．In a shop.

B．In a classroom.

C．In a canteen.

2. What do we know from the conversation?

A．The woman hasn’t used plastic plates and cups before.

B．Paper plates and cups have replaced plastic ones in the U.S.

C．The man is not interested in plastic materials.

2 . 听下面一段独白，回答以下小题。
1. What’s getting less and less these days according to the talk?

A．Empty land.

B．Garbage.

C．Water.

2. What do people suggest to deal with garbage?

A．Burying it.

B．Sending it out of our planet.

C．Using it as an energy source.

3. What is the problem with burning garbage?

A．It is hardly ever done.

B．It causes air pollution.

C．It is useless for hard materials.